Views: 2,445Updated October 2026 — Windows 10 and Windows 11 If you spend much time troubleshooting Windows computers, you know how frustrating it can be to find a particular configuration setting. Some options are in the modern Windows Settings application, others remain in the traditional Control Panel, and a few are buried several levels deep.
Windows GodMode: A Handy Shortcut to Windows Settings Read More »
Views: 754Most people never think about the Domain Name System (DNS) until something stops working. They enter a website address, press Enter, and expect the page to appear. Somewhere along the way, DNS helps translate the domain name into the IP address needed to reach the destination. What many Internet users do not realize is
Public DNS Servers Explained: Which One Should You Use? Read More »
Views: 769If you work with VoIP, and more specifically SIP long enough, eventually you find yourself staring at an INVITE, a handful of provisional responses, several IP addresses, a 200 OK, an ACK, and perhaps a BYE—and trying to mentally reconstruct what actually happened. Wireshark can certainly do this. In fact, Wireshark remains one of
sngrep: The SIP Troubleshooting Tool You Should Know Read More »
Views: 2,923Hi everyone! As many of you who have attended my conference presentations and Wi-Fi classes know, I spend time talking about the correct way of troubleshooting Wi-Fi networks. **********JUST UPDATED************* Power cycling or rebooting is NOT a first step. Here’s why: lets say you are having issues of some kind (slow speed, connectivity issues,
Our Comprehensive Wi-Fi Troubleshooting Guide Read More »
Views: 739Do not troubleshoot Wireshark captures by chasing random red and black packets. Start with triage, classify the traffic, branch into the correct protocol workflow, and then prove the finding with packet evidence. The following is a shortened version of our structured “Triage → Classify → Branch → Prove” Wireshark troubleshooting workflow built from your
Wireshark Troubleshooting Workflow Read More »
Views: 37,2272-Day Instructor-Led Hands-On Lab CourseAvailable through Web-Based Live Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students What Students are saying about this class Course Description Wireshark is one of the most powerful tools available to network technicians, engineers, administrators, and support professionals—but capturing packets is only the beginning. The real skill is
CSI-HO-020-A – Explore Packet Analysis with Wireshark Standard Edition – 2 Day Read More »
Views: 11,137Here’s a solid toolbox of Windows PowerShell commands used for network troubleshooting, with quick notes on what each one is good for. I’ll try to group them by task so they are a little easier to remember. 1. Basic Connectivity & “Ping-Style” Tests Test-Connection PowerShell’s ping (ICMP echo) equivalent. Test-NetConnection More advanced tester: port
PowerShell Commands Used for Network Troubleshooting Read More »
Views: 13,3831-Day Instructor-Led CourseWeb-Based Delivery or Self-Paced OnlineMinimum: 10 StudentsWeb Based Delivery: Max class size is 30On Site Delivery: Max class size is 20 Stop Guessing. Start Troubleshooting Systematically. When a customer says, “The network isn’t working,” where do you start? Good network troubleshooting is not about randomly changing settings, rebooting devices, or trying commands
CSI-SP-008 – Network Troubleshooting Fundamentals for Technicians – 1D Read More »
Views: 3,292Here are several VoIP troubleshooting checklists and tools, organized by focus area to help quickly identify and resolve common issues. These checklists are especially useful for IT admins, NOC teams, and VoIP engineers. Are they “the bees knees” of troubleshooting VoIP? No. In fact, if you have feedback or comments on improving these lists,
Some VoIP Troubleshooting Checklists and Tools Read More »
Views: 3,045PJSIP is a free, open-source multimedia communication library written in C that is used for troubleshooting VoIP. PJSIP implements standard-based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE, targeting VoIP (Voice over IP) applications, including SIP signaling and media handling. You will find the project at github here. What Is the PJSIP
VoIP Troubleshooting with PJSIP Read More »
Views: 3,983This article discusses what SIP pings are, and how to use them in troubleshooting VoIP (Voice over IP) networking. A SIP ping in VoIP is a diagnostic method used to check the availability and responsiveness of a SIP (Session Initiation Protocol) server or endpoint. It’s similar in concept to an ICMP ping, but it
What are and how to use SIP Pings in VoIP Read More »
Views: 8,382When testing the Internet, there are several key tools we use in troubleshooting: one of them is ping. To verify a particular IP address is operational we “ping 192.168.0.1” from the command line to see if we get an answer back, letting us know that the system we are pinging and the network itself
SIP Testing and Troubleshooting with sipsak Read More »
Views: 1,788At our Online School of Network Science, we have created a Network Scientist Tool Belt. This completely free resource is available for you to access, learn and add software and hardware tools to troubleshoot todays networks. You will just need to set up a free account, and the link will get you there. You
The Network Scientists Tool Belt Read More »
Views: 7,660As QUIC has emerged to begin its takeover of the Transport Layer (OK – we will never see TCP totally disappear), I have written multiple articles on QUIC. You can look them over here. In the early days Google made this really easy right within the Chrome web browser. As time has gone on
Troubleshooting QUIC Traffic – Not Easy Read More »
Views: 3,303Let’s start with some simple definitions of these protocols and how they work together. In Voice over IP (VoIP) to PSTN (telephone) network integration, MGCP and C15 can work together as part of a layered signaling architecture that bridges IP-based call control with traditional PSTN switching systems. Here’s how they fit and interact: MGCP
Troubleshooting C15 and MGCP Protocols for VoIP Read More »
